This lesson is intended to help you assess (formative assessment) how well students are able to interpret percent increase and decrease, and in particular, to identify and help students who have the following difficulties:
Translating between percents, decimals, and fractions.
Representing percent increase and decrease as multiplication.
Recognizing the relationship between increases and decreases.
How it works-
Students work in small groups on collaborative discussion tasks, to organize percent, decimal and fraction cards. As they do this, they interpret the cards’ meanings and begin to link them together. They also try to find relationships between percent changes. Throughout their work, students justify and explain their decisions to their peers. As students are working the teacher can walk around and guide students by questioning.
My teacher and I used this lesson to help students understand that decreasing by 50% does not always mean it increases by 50%. This really helped students to visualize increasing and decreasing, especially because it deals with money amounts. Through this lesson, it was really easy to formatively assess the students and where they were at with understanding the lesson.
I have attached the entire lesson that we used talking about increasing and decreasing percents and it was a really awesome unit and was very engaging and used a lot of manipulatives.
Increasing and Decreasing Quantities by a Percent
Mathematical goals-
This lesson is intended to help you assess (formative assessment) how well students are able to interpret percent increase and decrease, and in particular, to identify and help students who have the following difficulties:How it works-
Students work in small groups on collaborative discussion tasks, to organize percent, decimal and fraction cards. As they do this, they interpret the cards’ meanings and begin to link them together. They also try to find relationships between percent changes. Throughout their work, students justify and explain their decisions to their peers. As students are working the teacher can walk around and guide students by questioning.My teacher and I used this lesson to help students understand that decreasing by 50% does not always mean it increases by 50%. This really helped students to visualize increasing and decreasing, especially because it deals with money amounts. Through this lesson, it was really easy to formatively assess the students and where they were at with understanding the lesson.
I have attached the entire lesson that we used talking about increasing and decreasing percents and it was a really awesome unit and was very engaging and used a lot of manipulatives.